Method to Post Json Data

CheckAPI
Search Request JSON 
                                {
    	"EndUserIp": "1.1.1.1",
    	"ClientId": "XXXX",
    	"UserName": "XXXX",
    	"Password": "XXXX"
    }
Search Response JSON 
                                {
        "Error": {
            "ErrorCode": "0",
            "ErrorMessage": "CientID, Username, Password Verified. API working Fine"
        }
    }